Gglobal.c revision 28f33c8ce0b654cf31d6beda9a612870662f3c56 
1/* libunwind - a platform-independent unwind library
2   Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
3	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4
5   Modified for x86_64 by Max Asbock <masbock@us.ibm.com>
6
7This file is part of libunwind.
8
9Permission is hereby granted, free of charge, to any person obtaining
10a copy of this software and associated documentation files (the
11"Software"), to deal in the Software without restriction, including
12without limitation the rights to use, copy, modify, merge, publish,
13distribute, sublicense, and/or sell copies of the Software, and to
14permit persons to whom the Software is furnished to do so, subject to
15the following conditions:
16
17The above copyright notice and this permission notice shall be
18included in all copies or substantial portions of the Software.
19
20THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
27
28#include "unwind_i.h"
29#include "dwarf_i.h"
30
31HIDDEN pthread_mutex_t x86_64_lock = PTHREAD_MUTEX_INITIALIZER;
32HIDDEN int tdep_needs_initialization = 1;
33
34/* See comments for svr4_dbx_register_map[] in gcc/config/i386/i386.c.  */
35
36HIDDEN uint8_t dwarf_to_unw_regnum_map[17] =
37  {
38    UNW_X86_64_RAX,
39    UNW_X86_64_RDX,
40    UNW_X86_64_RCX,
41    UNW_X86_64_RBX,
42    UNW_X86_64_RSI,
43    UNW_X86_64_RDI,
44    UNW_X86_64_RBP,
45    UNW_X86_64_RSP,
46    UNW_X86_64_R8,
47    UNW_X86_64_R9,
48    UNW_X86_64_R10,
49    UNW_X86_64_R11,
50    UNW_X86_64_R12,
51    UNW_X86_64_R13,
52    UNW_X86_64_R14,
53    UNW_X86_64_R15,
54    UNW_X86_64_RIP
55  };
56
57HIDDEN void
58tdep_init (void)
59{
60  intrmask_t saved_mask;
61
62  sigfillset (&unwi_full_mask);
63
64  lock_acquire (&x86_64_lock, saved_mask);
65  {
66    if (!tdep_needs_initialization)
67      /* another thread else beat us to it... */
68      goto out;
69
70    mi_init ();
71
72    dwarf_init ();
73
74    tdep_init_mem_validate ();
75
76#ifndef UNW_REMOTE_ONLY
77    x86_64_local_addr_space_init ();
78#endif
79    tdep_needs_initialization = 0;	/* signal that we're initialized... */
80  }
81 out:
82  lock_release (&x86_64_lock, saved_mask);
83}
84